Elimination of a second-law-attack, and all cable-resistance-based attacks, in the Kirchhoff-law-Johnson-noise (KLJN) secure key exchange system
type: Item
instance of: scholarly article
title: Elimination of a second-law-attack, and all cable-resistance-based attacks, in the Kirchhoff-law-Johnson-noise (KLJN) secure key exchange system
zbMATH Open document ID: 1338.94077
author: Laszlo B. Kish
author: Claes-Göran Granqvist
published in: Entropy
publication date: 2016-06-15T00:00:00Z
full work available at URL: https://arxiv.org/abs/1406.5179
review text: Summary: We introduce the so far most efficient attack against the Kirchhoff-law-Johnson-noise (KLJN) secure key exchange system. This attack utilizes the lack of exact thermal equilibrium in practical applications and is based on cable resistance losses and the fact that the Second Law of Thermodynamics cannot provide full security when such losses are present. The new attack does not challenge the unconditional security of the KLJN scheme, but it puts more stringent demands on the security/privacy enhancing protocol than for any earlier attack. In this paper we present a simple defense protocol to fully eliminate this new attack by increasing the noise-temperature at the side of the smaller resistance value over the noise-temperature at the side with the greater resistance. It is shown that this simple protocol totally removes Eve's information not only for the new attack but also for the old Bergou-Scheuer-Yariv attack. The presently most efficient attacks against the KLJN scheme are thereby completely nullified.
Mathematics Subject Classification ID: 94A60
zbMATH DE Number: 6593588
zbMATH Keywords: unconditional security
zbMATH Keywords: KLJN key exchange
zbMATH Keywords: Johnson noise
zbMATH Keywords: second law
MaRDI profile type: Publication
OpenAlex ID: W3105337294
arXiv ID: 1406.5179
cites work: Totally secure classical communication utilizing Johnson (-like) noise and Kirchhoff's law
cites work: Johnson(-like)-noise-Kirchhoff-loop based secure classical communicator characteristics, for ranges of two to two thousand kilometers, via model-line
cites work: A classical key-distribution system based on Johnson (like) noise-how secure?
cites work: Noise in the wire: the real impact of wire resistance for the Johnson(-like) noise based secure communicator
DOI: 10.3390/E16105223
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description: scientific article; zbMATH DE number 6593588